*Steps to reproduce:*

1. Create a new project.

2. Open UI Builder and add any element

3. Select 1 of the style fields to change, e.g Size - Width.

4. Press tab. Nothing happens

*Actual results:* Editing of the field stops but the field is still selected

*Expected results:* The next field is selected for editing. In this case the Width field. 

*Reproducible with versions:* 6.0b13

*Not reproducible with versions:* 

*Can’t test with versions:* 

*Tested on (OS):* 

*Notes:*
* This works for the serialized attribute fields.